<template>
  <el-container class="home_container">
    <!-- 头部 -->
    <el-header>
      <div>
        <img src="../assets/heima.png" alt="" />
        <span>电商后台管理系统</span>
      </div>
      <el-button type="info" @click="logout">退出</el-button>
    </el-header>
    <el-container>
      <!-- 侧边栏 -->
      <el-aside :width="iscollapse? '64px':'200px'">
        <div class="toggle-button" @click="toggleCollspse">|||</div>
         <el-menu background-color="#545c64" text-color="#fff" active-text-color="#409EFF" unique-opened :collapse="iscollapse" :collapse-transition="false" router :default-active="activePath">
      <!-- 一级菜单 -->
      <el-submenu :index="item.id + ''" v-for="item in menuList" :key="item.id">
        <!-- 一级菜单模板区域 -->
        <template slot="title">
          <!-- 图标 -->
          <i :class="iconObj[item.id]"></i>
          <!-- 文本 -->
          <span>{{item.authName}}</span>
        </template>
        
            <!-- 二级菜单 -->
          <el-menu-item :index="'/' + subItem.path" v-for="subItem in item.children" :key="subItem.id" @click="saveNavState('/' + subItem.path)">
           <template slot="title">
             <!-- 图标 -->
            <i class="el-icon-menu"></i>
            <!-- 文本 -->
            <span>{{subItem.authName}}</span>
           </template>
          </el-menu-item>
          
       
      </el-submenu>
      </el-menu>
      </el-aside>
      <el-main>
        <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>

<script>
export default {
  data() {
    return {
      // 左侧菜单数据
      menuList:[],
      iconObj:{
        '125':'iconfont icon-user',
        '103':'iconfont icon-tijikongjian',
        '101':'iconfont icon-shangpin',
        '102':'iconfont icon-danju',
        '145':'iconfont icon-baobiao',
      },
      iscollapse:false,
      // 被激活的链接地址
      activePath:'',
    };
  },
  created() {
    this.getMenuList();
    this.activePath = window.sessionStorage.getItem('activePath')

  },
  methods: {
    logout() {
        // 清除seesssionStorage
        window.sessionStorage.clear()
        // 跳转到login页面
        this.$router.push('/login')
    },
    // 获取所有菜单
    async getMenuList() {
      // 发送请求获取左侧菜单
      const {data:res} = await this.$http.get('menus')
      console.log(res);
      if(res.meta.status !== 200) return this.$message.error(res.meta.msg)
      this.menuList = res.data
      
    },
    // 点击按钮，切换菜单的折叠与展开
    toggleCollspse() {
      this.iscollapse = !this.iscollapse
    },
    // 保存链接的激活状态
    saveNavState(activePath) {
      window.sessionStorage.setItem('activePath',activePath)
      this.activePath = activePath
    }
  },
};
</script>

<style scoped lang="less">
.home_container {
    height: 100%;
}
.el-header {
    background-color: #373d41;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-left: 0;
    color: #fff;
    font-size: 20px;
    > div {
        display: flex;
        align-items: center;
        span {
            margin-left: 15px;
        }
    }
}
.el-aside {
    background-color: #333744;
    .el-menu {
      border-right: none;
    }
}
.el-main {
    background-color: #eaedf1;
}
.iconfont {
  margin-right: 10px;
}
.toggle-button {
  background-color: #4A5064;
  text-align: center;
  font-size: 10px;
  line-height: 24px;
  color: #fff;
  letter-spacing: 0.2em;
  cursor: pointer;
}
</style>
